code: def testBatch(self):
      # Combine these two states, which each have a batch size of 2, together.
      # Request a batch_size of 5, which means that a new batch of all zeros will
      # be created.
      batched_states = state_util.batch(
          self._unbatched_states, batch_size=3
      )
  
      self._assert_sructures_equal(self._batched_states, batched_states)
  
file_path: magenta/magenta/common/state_util_test.py
imports: from magenta.common import state_util
  import numpy
  import tensorflow.compat.v1
label_desc: Use image node_id 3 for calling the StateUtilTest obj's underlying member method code with example usage: obj.testBatch() without return types